摘要:
A plurality of primer sets are designed based on a region where conservation at the amino acid level is observed among various microorganisms for known gene sequences corresponding to a gene coding for an enzyme of the L-amino acid biosynthetic pathway derived from Corynebacterium thermoaminogenes, preferably an enzyme that functions at a higher temperature compared with that of Corynebacterium glutamicum. PCR is performed by using the primers and chromosomal DNA of Corynebacterium thermoaminogenes as a template. The primers with which an amplification fragment has been obtained are used as primers for screening to select a clone containing a target DNA fragment from a plasmid library of chromosomal DNA of Corynebacterium thermoaminogenes.
摘要:
A plurality of primer sets are designed based on a region where conservation at the amino acid level is observed among various microorganisms for known gene sequences corresponding to a gene coding for an enzyme of the L-amino acid biosynthetic pathway derived from Corynebacterium thermoaminogenes, preferably an enzyme that functions at a higher temperature compared with that of Corynebacterium glutamicum. PCR is performed by using the primers and chromosomal DNA of Corynebacterium thermoaminogenes as a template. The primers with which an amplification fragment has been obtained are used as primers for screening to select a clone containing a target DNA fragment from a plasmid library of chromosomal DNA of Corynebacterium thermoaminogenes.
摘要:
A DNA fragment which encodes a polypeptide defined in the following (a) or (b), and a polypeptide defined in the following (c) or (d): (a) a polypeptide which has at least the amino acid sequence of the amino acid numbers 50 to 393 in SEQ ID NO: 2 shown in Sequence Listing, (b) a polypeptide which has at least the amino acid sequence of the amino acid numbers 50 to 393 in SEQ ID NO: 2 shown in Sequence Listing including substitution, deletion, insertion, addition, or inversion of one or several amino acids, and can constitute a protein having a carbamoyl-phosphate synthetase activity with a large subunit of carbamoyl-phosphate synthetase having the amino acid sequence of SEQ ID NO: 3, (c) a polypeptide which has the amino acid sequence of SEQ ID NO: 3 shown in Sequence Listing, (d) a polypeptide which has the amino acid sequence of SEQ ID NO: 3 shown in Sequence Listing including substitution, deletion, insertion, addition, or inversion of one or several amino acids, and can constitute a protein having a carbamoyl-phosphate synthetase activity with a small subunit of carbamoyl-phosphate synthetase having the amino acid sequence of the amino acid numbers 50 to 393 in SEQ ID NO: 2.
摘要翻译:编码以下(a)或(b)中定义的多肽的DNA片段和以下(c)或(d)中定义的多肽:(a)至少具有氨基酸的氨基酸序列的多肽 序列表所示的SEQ ID NO:2中的50〜393的酸值,(b)至少具有序列表所示的序列号2所示的氨基酸序列号为50〜393的氨基酸序列的多肽,包括取代, 一个或几个氨基酸的缺失,插入,添加或倒位,并且可以构成具有氨基甲酰磷酸合成酶活性的蛋白质,其具有氨基酸序列SEQ ID NO:3的氨基甲酰磷酸合成酶的大亚基,(c )具有序列表所示的SEQ ID NO:3的氨基酸序列的多肽,(d)具有序列表所示的SEQ ID NO:3的氨基酸序列的多肽,包括取代,缺失,插入,添加, 或反转一个或几个氨基酸,并可构成 具有氨基酸 - 磷酸合成酶活性的蛋白质,其具有SEQ ID NO:2中氨基酸序列号为50〜393的氨基酸序列的氨基甲酰磷酸合成酶的小亚基。
摘要:
A gene encoding a protein constituting sucrose PTS of coryneform bacterium is provided by amplifying a region existing downstream from sucrase gene in coryneform bacterium by the cassette-ligation mediated PCR to obtain DNA encoding sucrose PTS enzyme II, which is a protein defined in the following (A) or (B): (A) a protein which has the amino acid sequence of SEQ ID NO: 2 in Sequence Listing; (B) a protein which has the amino acid sequence of SEQ ID NO: 2 in Sequence Listing including substitution, deletion, insertion, addition or inversion of one or several amino acids, and an activity for binding to sucrose.
摘要翻译:通过盒式连接介导的PCR扩增棒状杆菌型细菌的蔗糖酶基因下游的区域,得到编码构成棒状细菌的蔗糖PTS的蛋白质的基因,得到编码下述定义的蛋白质的蔗糖PTS酶II的DNA( A)或(B):(A)序列表中具有SEQ ID NO:2的氨基酸序列的蛋白质; (B)序列表中具有SEQ ID NO:2的氨基酸序列的蛋白质,包括一个或几个氨基酸的取代,缺失,插入,添加或转化,以及与蔗糖结合的活性。
摘要:
A DNA fragment which encodes a polypeptide defined in the following (a) or (b), and a polypeptide defined in the following (c) or (d): (a) a polypeptide which has at least the amino acid sequence of the amino acid numbers 50 to 393 in SEQ ID NO: 2 shown in Sequence Listing, (b) a polypeptide which has at least the amino acid sequence of the amino acid numbers 50 to 393 in SEQ ID No: 2 shown in Sequence Listing including substitution, deletion, insertion, addition, or inversion of one or several amino acids, and can constitute a protein having a carbamoyl-phosphate synthetase activity with a large subunit of carbamoyl-phosphate synthetase having the amino acid sequence comprising at least the amino acid numbers 55 to 1113 of SEQ ID NO: 3, (c) a polypeptide which has the amino acid sequence comprising at least the amino acid numbers 55 to 1113 of SEQ ID NO: 3 shown in Sequence Listing, (d) a polypeptide which has the amino acid sequence comprising at least the amino acid numbers 55 to 1113 of SEQ ID NO: 3 shown in Sequence Listing including substitution, deletion, insertion, addition, or inversion of one or several amino acids, and can constitute a protein having a carbamoyl-phosphate synthetase activity with a small subunit of carbamoyl-phosphate synthetase having the amino acid sequence of the amino acid numbers 50 to 393 in SEQ ID NO: 2.
摘要翻译:编码以下(a)或(b)中定义的多肽的DNA片段,以及以下(c)或(d):( a)定义的多肽,其至少具有氨基酸的氨基酸序列 序列表所示的SEQ ID NO:2中的酸值为50〜393,(b)至少具有序列表所示的SEQ ID No:2的氨基酸序列号为50〜393的氨基酸序列的多肽,包括取代, 一个或几个氨基酸的缺失,插入,添加或倒位,并且可以构成具有氨基甲酰基 - 磷酸合成酶活性的蛋白质,其具有氨基酸 - 磷酸合成酶的大亚基,其氨基酸序列至少包含氨基酸数55至 SEQ ID NO:3的1113,(c)具有至少包含序列表所示的SEQ ID NO:3的氨基酸编号55至1113的氨基酸序列的多肽,(d)具有氨基酸的多肽 序列至少包含氨基酸序号55至1113 o f序列号3所示,包括一个或多个氨基酸的取代,缺失,插入,添加或倒位,并且可以构成具有氨基甲酰磷酸合成酶活性的氨基甲酰磷酸合成酶的小亚基的蛋白质, SEQ ID NO:2中氨基酸序列号为50〜393的氨基酸序列。
摘要:
A mutant of the genus Escherichia is described, the .alpha.-ketoglutarate dehydrogenase activity of which is deficient or reduced, and/or the phosphoenol pyruvate carboxylase and/or glutamate dehydrogenase activities of which are amplified. The mutant is useful in the fermentative production of L-glutamic acid.
摘要:
The present invention provides a method for producing L-methionine by culturing a microorganism in a medium to produce and accumulate L-methionine in the medium, and collecting the L-methionine from the medium, where the microorganism is deficient in a repressor of L-methionine biosynthesis system and has L-methionine productivity.
摘要:
L-Methionine is produced by culturing a microorganism which is deficient in repressor of L-methionine biosynthesis system and/or enhanced intracellular homoserine transsuccinylase activity is cultured in a medium so that L-methionine should be produced and accumulated in the medium, and collecting the L-methionine from the medium. The microorganism preferably further exhibits reduced intracellular S-adenosylmethionine synthetase activity, L-threonine auxotrophy, enhanced intracellular cystathionine γ-synthase activity and enhanced intracellular aspartokinase-homoserine dehydrogenase II activity. The present invention enables breeding of L-methionine-producing bacteria, and L-methionine production by fermentation.
摘要:
A microorganism which has a gene encoding an enzyme in which feedback inhibition is desensitized by substitution of one or two amino acids in PRPP amidotransferase encoded by purF of Escherichia coli, a gene encoding a protein which is an inactivated repressor of purine nucleotide biosynthesis encoded by purR, a gene encoding an enzyme which is inactivated purine nucleoside phosphorylase encoded by deoD, a gene encoding an enzyme which is inactivated succinyl-AMP synthase encoded by purA, a gene encoding an enzyme which is inactivated 6-phosphogluconate dehydrase encoded by edd, a gene encoding an enzyme which is inactivated phosphoglucose isomerase encoded by pgi and like is bred and a purine nucleoside is produced by culturing the microorganism.
摘要:
L-Arginine is produced by culturing a coryneform bacterium in which an arginine repressor involved in L-arginine biosynthesis is deleted by disrupting a gene coding for the repressor, and which has L-arginine producing ability in a medium to produce and accumulate L-arginine in the medium, and collecting the L-arginine from the medium.